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Add more depth to the upstart example in host_integration.rst
I found that the original example wasn't starting the docker container when docker is started. So, I modified it using information I found from https://groups.google.com/forum/#!msg/docker-user/OWz8EOpiXuo/L_uxGFQuYlkJ Also, upstart wasn't starting docker if it wasn't running ahead of time. So, I added a change to the docker upstart script to solve this.
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@ -29,6 +29,10 @@ Here are a few sample scripts for systemd and upstart to integrate with docker.
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Sample Upstart Script
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---------------------
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In this example we've already created a container to run Redis with an id of
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0a7e070b698b. To create an upstart script for our container, we create a file
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named ``/etc/init/redis.conf`` and place the following into it:
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.. code-block:: bash
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description "Redis container"
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@ -36,7 +40,32 @@ Sample Upstart Script
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start on filesystem and started lxc-net and started docker
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stop on runlevel [!2345]
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respawn
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exec docker start -a 0a7e070b698b
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script
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# Wait for docker to finish starting up first.
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FILE=/var/run/docker.sock
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while [ ! -e $FILE ] ; do
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inotifywait -t 2 -e create $(dirname $FILE)
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done
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/usr/bin/docker start -a 0a7e070b698b
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end script
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Next, we have to edit the docker upstart script (``/etc/init/docker.conf``)
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so that we run docker with ``-r=false``. In this example, we also ensure
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that docker will start running before *redis* is started.
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.. code-block:: bash
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description "Docker daemon"
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start on filesystem and started lxc-net
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start on (starting redis)
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stop on runlevel [!2345]
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respawn
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script
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/usr/bin/docker -d -r=false
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end script
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Sample systemd Script
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